package fair.service;

import com.alibaba.dubbo.config.annotation.Reference;
import fair.pojo.Permission;
import fair.pojo.Role;
import fair.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @author fair_wu
 * @version v1.0
 * @package fair.service
 * @date 2021-02-02 下午 23:44
 */

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService service;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user  = service.findByUsername(username);
        if (user == null) {
            //用户名不存在
            return null;
        }
        List<GrantedAuthority> list = new ArrayList<>();
        //动态给用户授权
        Set<Role> roles = user.getRoles();
        if (roles != null && roles.size() > 0){
            for (Role role : roles) {
                //遍历角色集合，为用户授予角色
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                if (permissions != null && permissions.size() > 0){
                    for (Permission permission : permissions) {
                        //遍历权限集合，为用户授予权限
                        list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                    }
                }
            }
        }
        org.springframework.security.core.userdetails.User securityUser =
                new org.springframework.security.core.userdetails.User
                        (username, user.getPassword(), list);
        return securityUser;
    }
}
